The chemical reactions and pathways resulting in the formation of carotenoids, tetraterpenoid compounds in which two units of 4 isoprenoid residues joined head-to-tail are themselves joined tail-to-tail. [ GOC:go_curators ]
Synonyms: carotenoid synthesis carotenoid biosynthesis carotenoid formation carotenoid anabolism
This is just here as a test because I lose it